Year	Number
2004-01-01	5.9211
2005-01-01	5.9689
2006-01-01	6.6746
2007-01-01	7.6077
2008-01-01	8.9474
2009-01-01	9.6651
2010-01-01	10.3828
2011-01-01	10.8134
2012-01-01	11.3038
2013-01-01	11.7584
2014-01-01	12.0933
2015-01-01	12.1651
2016-01-01	11.8541